65722419328 has 16 divisors (see below), whose sum is σ = 130931382510. Its totient is φ = 32861209600.

The previous prime is 65722419313. The next prime is 65722419331. The reversal of 65722419328 is 82391422756.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 64511936064 + 1210483264 = 253992^2 + 34792^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256728073 + ... + 256728328.

Almost surely, 2^65722419328 is an apocalyptic number.

It is an amenable number.

65722419328 is a deficient number, since it is larger than the sum of its proper divisors (65208963182).

65722419328 is an equidigital number, since it uses as much as digits as its factorization.

65722419328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513456415 (or 513456403 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 49.

The spelling of 65722419328 in words is "sixty-five billion, seven hundred twenty-two million, four hundred nineteen thousand, three hundred twenty-eight".